A can complete a piece of work in 12 days, and B can complete the same work in 36 days. In how many days will both, together, complete the work?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 9
Calculations:
Let the total work (LCM of 12 and 36) = 36 units
Efficiency of A = 36/12 = 3 units
Efficiency of B = 36/36 = 1 unit
Total efficiency = 4 units
Total number of days = 36/4 = 9 days.